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[libc++][string] Remove potential non-trailing 0-length array #105865

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merged 7 commits into from
Sep 10, 2024
Merged

[libc++][string] Remove potential non-trailing 0-length array #105865

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5cbdce6
[libc++][string] Remove potential non-trailing 0-length array
serge-sans-paille Aug 23, 2024
960e989
fixup! [libc++][string] Remove potential non-trailing 0-length array
serge-sans-paille Aug 24, 2024
f17a954
fixup! [libc++][string] Remove potential non-trailing 0-length array
serge-sans-paille Aug 29, 2024
72ff46d
fixup! fixup! [libc++][string] Remove potential non-trailing 0-length…
serge-sans-paille Sep 8, 2024
40da20f
fixup! fixup! fixup! [libc++][string] Remove potential non-trailing 0…
serge-sans-paille Sep 8, 2024
efc9123
fixup! fixup! fixup! fixup! [libc++][string] Remove potential non-tra…
serge-sans-paille Sep 9, 2024
1151a32
Reduce the diff
ldionne Sep 9, 2024
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12 changes: 10 additions & 2 deletions libcxx/include/string
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Original file line number Diff line number Diff line change
Expand Up @@ -749,6 +749,14 @@ struct __can_be_converted_to_string_view
struct __uninitialized_size_tag {};
struct __init_with_sentinel_tag {};

template <size_t _PaddingSize>
struct __padding {
char __padding_[_PaddingSize];
};

template <>
struct __padding<0> {};

template <class _CharT, class _Traits, class _Allocator>
class basic_string {
private:
Expand Down Expand Up @@ -853,7 +861,7 @@ private:

struct __short {
value_type __data_[__min_cap];
unsigned char __padding_[sizeof(value_type) - 1];
_LIBCPP_NO_UNIQUE_ADDRESS __padding<sizeof(value_type) - 1> __padding_;
unsigned char __size_ : 7;
unsigned char __is_long_ : 1;
};
Expand Down Expand Up @@ -905,7 +913,7 @@ private:
unsigned char __is_long_ : 1;
unsigned char __size_ : 7;
};
char __padding_[sizeof(value_type) - 1];
_LIBCPP_NO_UNIQUE_ADDRESS __padding<sizeof(value_type) - 1> __padding_;
value_type __data_[__min_cap];
};

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